mb.org nvm then moving on
its also favourable to review clock for clock.
IE 3770K VS 2700K
EDIT: the only defining but minimal differences are
memory bandwidth is equal but the latency is lower, seems they did some tuning.
clock for clock IB is around 8% faster sometimes lower.
Lucid MVP is hit and miss with performance enhancements, but when its done correctly huge performance increases can be seen.
die shrink has made overclocking less desirable but 24/7 4.8ghz OC's are achievable.
As intel stated, it's a tick and not tock
If you have 2500k, 2600k or 2700k on z68 - Keep that system
if you have 2500k,2600k or 2700k on p67 - i would personally say keep the system
if you have 2500k,2600k or 2700k on z77 - it may be beneficial to go for IB, this is a more personal choice
if you're building a complete new system - Go IB